Firefox Studies must be disabled.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-252909 | SRG-APP-000141 | FFOX-00-000039 | SV-252909r960963_rule | 2026-05-08 | 6 |
Description
Studies try out different features and ideas before they are released to all Firefox users. Testing beta software is not in the DoD user's mission.
ℹ️ Check
Type "about:policies" in the browser address bar.
If "DisableFirefoxStudies" is not displayed under Policy Name or the Policy Value does not have a value of "true", this is a finding.
✔️ Fix
Windows group policy:
1. Open the group policy editor tool with "gpedit.msc".
2. Navigate to Policy Path: Computer Configuration\Administrative Templates\Mozilla\Firefox
Policy Name: Disable Firefox Studies
Policy State: Enabled
macOS "plist" file:
<key>DisableFirefoxStudies</key>
<true/>
Linux "policies.json" file:
Add the following in the policies section:
"DisableFirefoxStudies": true